Preliminary Report Upon Invertebrate Fossils Collected by the Expeditions of 1871, 1872, and 1873: W, Book by Surveys West of the 100th Meridian (U.S. (Hardcover)

body { display: block !important; }

This site requires JavaScript.
Please enable JavaScript before proceeding:

Firefox

Internet Explorer

On the Tools menu (top right of browser), click Internet Options, and then click the Security tab.
Click the Internet Zone.
If you do not have to customize your Internet security settings, click Default Level. Then go to step 5.
If you have to customize your Internet security settings, follow steps a & b, then go to step 5:
1. Click Custom Level.
2. In the Security Settings - Internet Zone dialog box, click Enable for Active Scripting in the Scripting section.
Click OK to close the Internet Options popup.
Refresh your browser page to run scripts and reload content.

Chrome

On the Control button (top right of browser), select Settings from dropdown.
Click on + Show advanced settings.
Under the header JavaScript select the following radio button: Allow all sites to run JavaScript (recommended).
Click OK to close the Content Settings popup and close the Settings tab.
Refresh your browser page to run scripts and reload content.